Building construction



June 1 1926. 1,587,145

I W. G. CARNEGIE BUILDING CONSTRUCTION Filed'Sept. 26, 1921 2Sheets-Sheet 1 June 1, 1926. V

w. e. CARNEGIE BUILDING CONSTRUCTION Filed Sept. 26 1921 2 Sheets-Sheet2 law/4511 11 2 SRDDLE Patented June 1, 1926.

UNETEED l fii i li WILLIAM G. CARNEGIE, OE CHICAGO, ILLINOIS.

BUILDING CONSTRUCTION.

Application filed September 26, 1921.

This invention relates more particularly to buildings having large clearspans, such as garages factories or the like and is particularlydirected to the roof portions of such buildings. Garages as now commonlybuilt are made with arch trusses with the roof supported on the upperchords of the trusses and the monitor mounted at the top of the trusses.This necessitates a large amount of waste space in the top of thebuilding which requires extra heat radiators for heating the same andfurthermore raises the monitor so high that it interferes with the lightfrom the same.

One of the objects of this invention is to provide a buildingconstruction in which there will be comparatively little waste space inthe top of the building. Another object is to provide a roofconstruction in which the monitor will be located as low as possiblewhile providing the necessary head room. Other objects are to providearoof construction in which the trusses are so constructed that the mainportion of the roof will be supported on the lower truss chords; toprovide a combined roof and monitor with the monitor built into the rooftrusses and to provide such other advantages and novel features as willappear more fully hereinafter.

In the accompanying drawings illustrating my invention;

Figure 1 is a side View of a complet building;

Figure 2 is a plan View of the roof shown on a smaller scale;

Figure 3 is a cross sectional view taken on the line 3-3 of Figure 5;

Figure 1 is a plan view of a portion of the roof shown on an enlargedscale; and,

Figure 5 is a cross sectional view.

As shown in these drawings, the building 6 is provided with any suitablenumber of trusses 7 which preferably extend across the building butwhich may be arranged in any suitable manner for different types ofbuildings. These trusses are supported on the side walls 8. Each trusshas outer top chord members 9 and inner or central top chord members 10.They also have outer bottom chord members 11 and a central member 12.The inner ends of the members 9 and 11 are connected by vertical postsor web members 26 and any suitable number of diagonal web members suchas 13 and 14 may be used for bracing the serial No. 503,702.

trusses. It will be understood that these chords and web members may besecured together in any suitable or well known manner.

The joists 15 are supported at their inner ends on longitudinal beams orpurlins 16 and at their outer ends on the walls 8 or by other purlins inthe eventthat the outer ends of the trusses are supported on columnsinstead of on walls. The outer ends of the joists are preferably raisedsomewhat above the ends of the trusses so as to permit continuousdrainage of water and thereby avoiding the necessity of numerous downspouts. The roof covering 17 for the main portions of the roof iscarried directly by the joists 15 and saddles are provided along theouter portions of the roof to direct the water longitudinally of thebuilding. For instance, in the arrangement shown in Figure 2 the downspouts 18 are positioned at the center of the building and the saddlepitches from the ends toward the center. In the arrangement shown inFigure 1, the roof of the saddle is at the center of the building andthe saddle pitches toward the ends.

By means of this arrangement it will be seen that only about two-thirdsof the total weight of the roof construction and about two-thirds of thelive load weight is carried by trusses, the remaining portion of thelive and dead load being carried by the walls. The portions of thetrusses which project above the roof covering 16 are preferably boxed inby means of boxes or coverings 19 so that they will not be exposed tothe weather.

The monitor 20 is built into the truss construction and may be said toform an integral part of the roof. The joists 21 of the monitor roof aresupported on longitudinal beams or purlins 22 and 23 and the roofcovering 24 is carried directly by these joists. The sides of themonitor are secured to the vertical posts 26 of the trusses and arepreferably provided with windows which may be arranged in any suitableor well known manner. By means of this construction, the light may enterthe building closer to the floor line than with the ordinaryconstruction where the monitor is mounted above the top chords of thetrusses. The construction of the trusses also permits the installationof continuous monitor sash operators without interference from any ofthe structural members of the trusses, thus effecting a saving in theinstallation of the operators and insuring more perfect ventilation.This improved construction also reduces the expense of the roof inasmucha large portion of the load is carried di rectly bv the wells instead ofby the trusses.

It will be noted that the truss may be varied in form and shape fordifferent buildings and the parts may he changed Without departing fromthe scope of this invention as set forth in the following claim:

In a building the combination with the side walls, of one or moretrusses supported by said walls, roof joists having their outer endscarried by the Walls and their inner ends supported by the trusses aroof covering on said joists, a central roof having joists carried bythe upper chords of the trusses and a roof covering thereover and wallsextending from the outer edges of the central roof portion downwardly tothe inner edges of the outer roof portions thereby forming a centralmonitor.

WVILLIAM G. CARNEGIE.

